assertThat(map.containsKey(one)).isFalse();
    assertThat(map.containsValue(one)).isFalse();
    assertThat(map.putIfAbsent(two, three)).isNull();
    assertThat(map.remove(two)).isSameInstanceAs(three);
    assertThat(map.put(three, one)).isNull();
    assertThat(map.put(one, two)).isNull();

    assertThat(map).containsEntry(three, one);
    assertThat(map).containsEntry(one, two);

    segment.setValueForTesting(entry, value);

    assertThat(segment.get(key, hash)).isNull();

    // count == 0
    segment.setTableEntryForTesting(index, entry);
    assertThat(segment.get(key, hash)).isNull();
    assertFalse(segment.containsKey(key, hash));
    assertFalse(segment.containsValue(value));

    // count == 1
    segment.count++;

    segment.setValueForTesting(entry, value);

    assertThat(segment.get(key, hash)).isNull();

    // count == 0
    segment.setTableEntryForTesting(index, entry);
    assertThat(segment.get(key, hash)).isNull();
    assertFalse(segment.containsKey(key, hash));
    assertFalse(segment.containsValue(value));

    // count == 1
    segment.count++;

        .build()
    assertThat(request.tag()).isNull()
    assertThat(request.tag(Any::class.java)).isNull()
    assertThat(request.tag(UUID::class.java)).isNull()
    assertThat(request.tag(String::class.java)).isNull()

    // Alternate access APIs also work.
    assertThat(request.tag<String>()).isNull()
    assertThat(request.tag(String::class)).isNull()
  }

  @Test
  fun defaultTag() {

        boundary = "simple boundary",
        source = Buffer().writeUtf8(multipart),
      )

    assertThat(parts.nextPart()).isNotNull()
    assertThat(parts.nextPart()).isNull()
    assertThat(parts.nextPart()).isNull()
  }

  @Test fun `empty source`() {
    val parts =
      MultipartReader(
        boundary = "simple boundary",
        source = Buffer(),
      )

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3

import assertk.assertThat
import assertk.assertions.isEqualTo
import assertk.assertions.isNull
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.ResponseBody.Companion.asResponseBody
import okhttp3.ResponseBody.Companion.toResponseBody
import okio.Buffer
import okio.ByteString.Companion.encodeUtf8

    fakeTicker.advance(2, MILLISECONDS);
    assertThat(cache.getIfPresent(10)).isNull();
    assertThat(cache.getIfPresent(20)).isNull();
    assertThat(cache.getIfPresent(4)).isNull();

    cache.put(10, 20);
    assertThat(cache.getIfPresent(10)).isEqualTo(20);

    fakeTicker.advance(1000, MILLISECONDS);
    assertThat(cache.getIfPresent(10)).isNull();
  }

  @Test
  public void expireAfterWriteAndAccess() {

    assertEquals(TestEnum.HONDA, converter.convert("HONDA"));
    assertEquals(TestEnum.POODLE, converter.convert("POODLE"));
    assertThat(converter.convert(null)).isNull();
    assertThat(converter.reverse().convert(null)).isNull();
  }

  public void testStringConverter_convertError() {
    Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);

    Collections.addAll(strings, "one", "two", "three");
    SortedMap<String, Integer> map = Maps.asMap(strings, LENGTH_FUNCTION);
    assertThat(map.comparator()).isNull();
    assertEquals(ImmutableSortedMap.of("one", 3, "two", 3, "three", 5), map);
    assertThat(map.get("four")).isNull();
    strings.add("four");
    assertEquals(ImmutableSortedMap.of("one", 3, "two", 3, "three", 5, "four", 4), map);

    fakeTicker.advance(2, MILLISECONDS);
    assertThat(cache.getIfPresent(10)).isNull();
    assertThat(cache.getIfPresent(20)).isNull();
    assertThat(cache.getIfPresent(4)).isNull();

    cache.put(10, 20);
    assertThat(cache.getIfPresent(10)).isEqualTo(20);

    fakeTicker.advance(1000, MILLISECONDS);
    assertThat(cache.getIfPresent(10)).isNull();
  }

  @Test
  public void expireAfterWriteAndAccess() {